JP3100590B1 - Vacuum generator for vacuum cleaner - Google Patents

Abstract

Abstract: [PROBLEMS] By realizing the rotor and impeller of an axial type coreless brushless DC motor as an integrated structure, ultra-small, thin, low weight, low noise, long life, zero carbon dust, And a vacuum generator for a vacuum cleaner capable of improving productivity. An axial brushless DC motor in which upper and lower rotors of a disk are opposed symmetrically to upper and lower ends of a rotating shaft rotatably supported on an inner peripheral portion of a disk stator. And upper and lower impellers integrally fixed to the upper and lower rotors, respectively, and an outer peripheral portion coupled to an outer peripheral portion of the disk type stator, respectively, and suction through a suction port formed at a central portion of each with the stator. And an upper and lower housing for guiding the supplied air to one side discharge port.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum generator for a vacuum cleaner, and more particularly, to an ultra-small size by realizing an axially coreless brushless DC motor rotor and impeller as an integrated structure. Thinner,
Low weight, low noise, long life, zero carbon dust,
And a vacuum generator for a vacuum cleaner capable of improving productivity.

[0002]

2. Description of the Related Art In accordance with the development of the electronics industry, vacuum cleaners are becoming smaller and thinner, and downsizing and weight reduction have been greatly advanced up to now. It is said that it is difficult to further reduce the size in the reduction.

In general, there are two types of vacuum cleaners: a normal type as shown in FIG. 9, an upright type and a canister type which are mainly used in Europe. Miniaturization and weight reduction remain issues to be solved along with ease of cleaning work.
In particular, in the upright method, the load applied to the hand during the cleaning operation is large, the degree of fatigue is increased, and the inconvenience of the operation according to the large volume is added.

Hereinafter, the structure of a conventional vacuum cleaner will be described with reference to FIGS. 9 and 10. FIG.

The conventional vacuum cleaner has a built-in motor 3 for generating a vacuum suction force by fixing an impeller to a rotating shaft in a main body housing 1 movably mounted with a wheel 2 at a lower portion thereof. At the tip of the motor 3, a dust pack 4 for storing sucked dust is attached, and at the tip of the dust pack 4, a dust suction port 6 is detachably connected through a vacuum suction hose 5, and behind the housing 1, Filter 7 is installed.

[0006] Such a conventional vacuum cleaner includes a motor.
The drive of 3 rotates the impeller to generate suction force,
As a result, dust is sucked into the dust pack 4 through the suction port 6.

However, the conventional vacuum generator for a vacuum cleaner using an AC universal motor used here uses a core iron 9a to generate a rotating magnetic field, as shown in a partial sectional view of FIG. Both ends of a rotating shaft 8 around which a rotor coil 9 is wound are rotatably supported by bearings 10 and 20 fixed to a motor housing 16, respectively. Is arranged.

An upper bearing 10 is provided at the upper end of the rotating shaft 8.
The impeller 12 is connected with a pair of washers 13 and is fixed by a nut 14 and a fixing bolt 15.

In this case, the driving power of the motor is supplied from the carbon brush 19 elastically supported by the housing 16 to the rotating shaft.
The rotor is applied to the rotor coil 9 through a commutator 18 formed integrally with the lower portion of the rotor 8 to generate a rotating magnetic field, thereby rotating the rotor.

Thus, when the impeller 12 rotates, the air sucked into the upper central hole 17 of the housing 16 is discharged to the lower outlet 16a according to the flow of the arrow, and
A vacuum suction input is generated inside.

[0011]

However, the conventional motor used to generate a vacuum suction force has a problem that the air suction noise generated at the time of high-speed rotation due to an increase in the air output also increases. However, the AC universal motor having the core type brush has a limitation in reducing the length in the axial direction to reduce the size, thickness, and weight of the motor due to the structure of the motor. In addition, since the guide structure from the suction to the discharge of the air by the impeller is also formed along the axial direction of the motor, there is a problem that the structure is complicated and the output efficiency is poor.

In the conventional structure, since the impeller 12 and the rotor 9 are of a separated type in which they are not integrated, they are connected by using another spacer, washer, nut and bolt, and the internal air pressure is efficiently increased. Air guide vane 21 that guides air from the impeller 12 to the discharge port 16a is required, so that the assembly structure is complicated, productivity is inferior, and unit price increases. It became so.

Further, when manufacturing the impeller, a structure in which the upper and lower plates made of an Al plate material and a number of blades are vertically connected to each other in order to reduce the mechanical strength and weight following high-speed rotation. A deviation in the degree of vacuum occurs according to the degree of coupling between the blade and the blade, and the degree of adhesion between the upper and lower plates and the blade must be improved when assembling the press, which is a major problem in production.

Further, in the structure employing the carbon brush, the environmental pollution problem is caused by the scattering of carbon dust according to the wear of the brush, the limit of the motor life due to the replacement of the worn brush, the spark between the commutator and the brush. Occurs,
And problems such as emission of electromagnetic waves.

On the other hand, in order to solve the above problems, some attempts have been made to partially solve the problem by employing a twin impeller, an AC inverter motor, a brushless motor, etc. It cannot be considered, and no further progress has been made due to the limitations of motor size (105.4mm) and weight (1.35kg).

An object of the present invention is to realize an ultra-small, thin, low-weight, low-noise, long-life product by realizing the rotor and impeller of an axial type coreless brushless DC motor as an integrated structure. An object of the present invention is to provide a vacuum generator for a vacuum cleaner capable of reducing carbon dust and improving productivity.

Another object of the present invention is to integrally mold the impeller blade and lower plate together with the rotor split magnet, magnet holder and magnet plate as a rotor support by insert molding. An object of the present invention is to provide an integrated impeller structure that can improve productivity and improve the degree of adhesion between the upper and lower plates and the blade by integrally bonding the upper plate by ultrasonic fusion.

Still another object of the present invention is to eliminate the necessity of an air guide vane for guiding air sucked by an impeller to an outlet inside a housing, to have a simple air guide structure and to reduce air resistance. An object of the present invention is to provide a vacuum generator for a vacuum cleaner which receives less.

[0019]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a stator located at a central portion, which includes a plurality of stator coils integrally with a disk-shaped support, and is rotatably supported by the stator. A plurality of N-pole and S-pole split piece magnets are alternately arranged along the circumferential direction at predetermined intervals above and below the stator at predetermined intervals above and below the stator to form a disk shape. Upper and lower rotors that are rotated by interaction with force, upper and lower impellers fixed to the upper and lower rotors, respectively, and an outer peripheral portion coupled to the disk-type stator support, respectively, together with the stator support. Upper and lower housings that guide air sucked through an inlet formed in the center of the A vacuum generating device configured to be disposed in a housing of the vacuum cleaner so that the suction port is connected to a dust suction portion of the vacuum cleaner, and used for a vacuum cleaner. I do.

Each of the upper and lower rotors is
A disk-type magnet holder having a number of N-pole and S-pole split piece magnets, a number of insertion holes into which the plurality of split piece magnets are inserted, and a number of coupling protrusions used for coupling an impeller; and an upper portion of the magnet holder And a disc-shaped magnet plate having a magnetic circuit formed therein and having a large number of coupling through holes formed therein, wherein a large number of coupling projections of the magnet holder are formed on the lower plate of the impeller through the multiple through holes of the magnet plate. The rotor and the impeller are fixed integrally by being inserted and fixed in the fixing groove.

The upper rotor and the upper impeller, and the lower rotor and the lower impeller are each a disk type having a plurality of the N-pole and S-pole split magnets and a plurality of insertion holes into which the multiple split magnets are inserted. A magnet holder, a disk-shaped magnet plate arranged to form a magnetic circuit on the top of the magnet holder, a rotor support for covering the outer periphery and the back surface of the magnet holder and the magnet plate, and an upper portion of the rotor support A plurality of blades integrally formed on a surface or a lower surface, each of the blades having a coupling projection, and an upper plate having a coupling hole coupled to the coupling projection of each of the blades; Is integrated by insert molding using engineering plastic It is molded.

Each of the upper and lower housings and the support of the stator has a diameter gradually increasing from a center side to an outer peripheral portion at one point, and the outer peripheral portion at one point is adjacent to the one point at another point adjacent to the one point. The outer periphery of the point has a shape extending in parallel, and the outlet is formed in a parallel extension of one point and another point.

Preferably, the air discharged from the upper and lower impellers is integrally formed on an upper surface and a lower surface of the stator support so as to divide the discharge passage and guide the air to a discharge port, and the direction of the centrifugal force is increased. May further include a plurality of air guide vanes extending a predetermined distance along.

Further, the vacuum generator may further include a plurality of through holes formed in upper and lower rotors for self-cooling the stator coil.

According to another feature of the present invention, the upper and lower rotors of the disk type stator are symmetrically arranged at both ends of a rotating shaft rotatably supported on the inner periphery of the disk type stator with the upper and lower portions of the stator facing each other. The arranged axial type brushless DC motor, the upper and lower impellers which are integrally fixed to the upper and lower rotors, respectively, and the outer peripheral portion of which is coupled to the outer peripheral portion of the disk type stator, respectively, together with the stator. An upper and lower housing for guiding air sucked through a suction port formed at a central portion to a discharge port on one side, wherein the suction port is connected to a dust suction portion of the vacuum cleaner and is inside the housing of the vacuum cleaner. Provided is a double impeller type vacuum generator configured to be disposed and used for a vacuum cleaner.

According to still another feature of the present invention, the upper and lower rotors of the disk type stator are symmetrical with respect to the upper and lower portions of the stator at both ends of a rotating shaft rotatably supported on the inner periphery of the disk type stator. Axial type brushless DC motor, an impeller integrally fixed to one of the upper and lower rotors, and a rotor side where the impeller is not attached from an outer peripheral portion of the disk type stator. A number of vertically extending connecting portions, the other ends of the plurality of connecting portions are fixed to a lower surface, and an outer peripheral portion is extended so as to cover the motor, and a diameter from a center side to an outer peripheral portion at one point is increased. A lower housing in which an outer peripheral portion of one point and an outer peripheral portion of the other point are extended in parallel to each other and gradually increased at another point adjacent to the one point; The outer peripheral portion is connected to the outer peripheral portion of the lower housing in a shape corresponding to the housing, and the outer peripheral portion is extended in parallel with the air sucked through a suction port formed in the central portion together with the lower housing according to the rotation of the impeller. An upper housing for guiding to a formed discharge port, wherein the suction port is connected to a dust suction portion of the vacuum cleaner and is disposed in the housing of the vacuum cleaner, and is used for a vacuum cleaner. A single impeller type vacuum generator is provided.

[0027]

As described above, the present invention uses an axial-type coreless brushless DC motor and realizes an integral structure of the motor, the rotor and the impeller, thereby optimizing a space factor and improving the impeller. The number of rotations of the motor can be minimized while maintaining the same degree of vacuum by attaching to the upper and lower surfaces of the double rotor. As a result, it is possible to achieve ultra-miniaturization, thinning, low weight, low noise, long life, zero carbon dust, and improved productivity.

Further, when manufacturing the impeller, the blade and lower plate of the impeller are separated from each other by using engineering plastic, and the divided magnet of the rotor, the magnet holder,
By integrally molding as a rotor support with the insert molding method together with the magnet plate and the upper plate integrated by ultrasonic fusion, the productivity is improved and the adhesion between the upper and lower plates and the blade is improved. The resulting integrated impeller structure is realized.

[0030]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings.

FIG. 1 is a partially cutaway view showing a vacuum generator for a double impeller type vacuum cleaner according to a first embodiment of the present invention, and FIG. 2 is an exploded view of the first embodiment with an upper / lower case removed. FIG. 3 is a cross-sectional view showing a connection relationship between a rotor and an impeller when a separately manufactured impeller is used.

A double impeller type vacuum generator for a vacuum cleaner according to a first embodiment of the present invention is an axial coreless type proposed by the present applicant and registered in Japanese Patent No. 213571 as a power source for generating rotational power. In the brassless DC motor, a double rotor type (double rotor type) motor is used as a basic structure, which is modified to be suitable for a motor for a vacuum generator.

The vacuum generator of the present invention, including the modified motor 30, comprises a centrally located single stator.
40, upper and lower rotors 51, 51a fixed to bushings 34, 35 at both ends of a rotating shaft 31 rotatably supported by the stator 40 and arranged at the upper and lower portions of the stator 40,
Upper and lower impellers 60, 60a fixed to the upper and lower rotors 51, 51a, respectively, and upper and lower housings 70, which are coupled to a stator support 41 forming the stator 40 and serve as a guide for guiding the sucked air. , 70a
And consisting of

In this case, the upper rotor 51 and the upper impeller 60, and the lower rotor 51a and the lower impeller 60a are each integrally supported by the rotating shaft 31 so as to be rotatable.
The impeller assemblies 50, 50a are formed.

More specifically, the stator 40 includes:
As shown in FIG. 2, the disk-type stator support 41 has a structure in which, for example, six bobbin-less (or bobbin-type) stator coils 43 are integrally formed by an insert molding method (in this case, moisture-proof and vibration-absorbing). ,
Corrosion resistance, durability, and electrical insulation are improved). The number of the stator coils 43 can be changed according to the number of magnets (the number of poles) or the driving method (two-phase or three-phase) of the rotors 51 and 51a.

In the three-phase driving system, the stator coil 43 is divided into six coils, wound by rectangular coils, connected by a PCB 42 described later in a Y system, and driven by a two-phase radio wave drive. In the system, two stator coils are wound into eight and connected in series.

As shown in FIG. 1, the stator coils 43 are insert-molded while being fixed to both sides of a printed circuit board (PCB) 42, respectively.
Or PCB42 after each is wound up in a single body (Figure 2)
It is also possible to perform molding while being fixed to one side of the surface. In this case, the PCB 42 includes a hall element for detecting the rotational position of the rotors 51 and 51a.

The inner peripheral portion of the disk-type stator support 41 has an annular projection 41a formed in the middle of the inner peripheral portion so as to support the pair of ball bearings 32, 33 at predetermined intervals. Pair of ball bearings 3
The rotation shaft 31 is rotatably supported by the rotation shafts 2 and 33 in a stable structure. Therefore, vibration is prevented even when the rotors 51 and 51a rotate at high speed.

The upper and lower rotors 51 and 51a have the same structure. As shown in FIG. 2, the structure of the upper rotor 51 is an Al magnet holder 53 having a large number of insertion holes 53a.
A number of split piece magnets 52 are inserted.

Further, the upper part of the magnet holder 53 is shown in FIG.
As shown in FIG. 5, a large number of coupling projections 54 are inserted and fixed into the fixing grooves 65 of the upper impeller 60 which are coupled to the upper part through the large number of through holes 56 of the disk-shaped magnet plate 55 forming the magnetic circuit.

The upper impeller 60 shown in FIG. 3 is a case where a normal impeller already manufactured separately is used. The upper impeller 60 and the lower plate 61 made of Al and having an opening 64 at the center are used.
In this structure, a number of blades 62 are fixed between the blade 63 and the blade 63.
The coupling projection 54 can be formed integrally when the lower plate 63 is molded.

Therefore, according to the present invention, even when a conventional impeller is used, the magnet plate 55 and the upper impeller 60 can be easily formed by a simple press operation such as an air press using a large number of coupling projections 54 formed on the magnet holder 53. In addition, they are securely connected together and do not cause another increase in length following the mutual connection.

Also, by adjusting the concentricity and verticality of the guide holes and the like at the time of pressing, vibrations generated during high-speed rotation can be minimized. Further, even when the rotor is rotated at a high speed by the magnet holder 53, a phenomenon in which the divided magnets 52 are separated by centrifugal force can be prevented.

The lower rotor 51a is connected to the upper rotor 51.
And the same connection structure with the lower impeller 60a.

On the other hand, an extension 45 extending vertically is formed on the outer periphery of the stator support 41, and
As shown in FIG. 5, the outer shape of 41 is such that the diameter gradually increases from one point P1 like a spiral tube centering on the circular motor 30 and the impellers 60 and 60a, and the one point P1
And at the other point P2 adjacent thereto, the shape is extended in parallel with each other.

Air intake ports 71, 71a are formed at the center of the upper and lower sides of the extension 45, respectively, and the outer peripheral portions of the upper and lower housings 70, 70a in the form of a spiral tube are connected to each other to form a stator. Together with the support 41, it serves to guide the air taken in in response to the rotation of the impellers 60, 60a to the outlets 72, 72a.

The stator 40 and upper and lower rotors
A predetermined air gap is placed between the stator coils 51 and 51a, and in this case, the Fleming left hand rule is established between the stator coils 43 and 44 and the magnets 52 of the upper and lower rotors 51 and 51a. Acting to rotate the rotor.

As the rotors 51, 51a rotate, the upper and lower impellers 60, 60a rotate, and as a result, the suction ports 71, 7
The air sucked into 1a forms a main airflow X according to a solid line as shown in FIG. 1 and a cooling airflow Y to stator coils 43 and 44 following a dashed line passing through the through holes 57 and 57a of the rotor. Then, it is transferred along the inner walls of the upper and lower housings 70, 70a by centrifugal force and discharged to the outlets 72, 72a. Therefore, the self-cooling of the motor coil is performed, and the air inside the vacuum cleaner housing including the vacuum generator is discharged to the outside of the vacuum cleaner housing through the discharge ports 72 and 72a. , A vacuum is generated.

Further, the vacuum generator and the motor 30
Forms a magnetic circuit or a physically symmetric structure as a whole around the rotating shaft 31 or the stator 40.

In this case, the stator coils 43, 44 of the corresponding stator 40 attract the corresponding magnets 52 of the upper and lower rotors 51, 51a with the same force, or the coils are wound so as to repel each other. The line direction and the direction of the current flow are set. Therefore, the upper and lower rotors 51, 51a
Receives the same amount of suction or repulsion in the opposite direction by the stator 40, the suction or repulsion acting on the rotor by the stator is offset, and the axial vibration of the rotor minimizes noise generation. As a result, the noise can be minimized, so that the torque can be increased more than twice.

As a result, conventionally, when measured at a distance of 1 m in a single motor state at 32,000 RPM, the result was 100 dB (A). However, the present invention is at least 23 dB (A) when maintaining the same degree of vacuum. Can be reduced.

In such a vacuum generator of the present invention, the motor itself has a double rotor structure and the driving torque is 2
Since the motor is doubled, the size of the motor is greatly reduced compared to the conventional motor having the same driving torque, which can be brought to a compact structure, and the connection between the impeller 60 and the double rotor type motor 30 can be improved. It is made much simpler and integrated without causing additional length increases due to interconnections.

As a result, the vacuum generator according to the present invention
The length L1 in the axial direction is 49mm, about half of the conventional length (105mm)
And reduced the size of the vacuum cleaner.

Further, the motor used in the present invention is:
Because of the coreless brushless structure, the conventional vacuum generator weighs 1.35 kg, but the present invention can be embodied with 800 g and the motor life is as short as 200 hours (the brush type). However, in the present invention, a minimum of 3000
It can be used for more than an hour, and the problem of carbon dust has been automatically eliminated.

FIG. 4 is a partial cutaway view showing a vacuum generator for a single impeller vacuum cleaner according to a second embodiment of the present invention, and FIG. 5 is a plan view of the second embodiment.

The second embodiment is a double impeller type of the first embodiment.
It is a single impeller type unlike the embodiment. 4 and 5, the same portions as those in the first to third embodiments are denoted by the same reference numerals, and description thereof will be omitted.

First, the motor 30 uses a double-rotor coreless brushless DC motor as in the first embodiment, and has a structure in which a single impeller 60 is mounted only on the upper rotor 51 and cannot be mounted on the lower rotor 51a. .

Therefore, the stator support 41b secures an internal space between the upper and lower housings 70 and 73,
As in the first embodiment, a number of bosses 46 for coupling to the lower housing 73 are projected from the lower surface without extending the outer peripheral portion long, and by fixing the fixing bolts 74 to the bosses 46, the stator support 41b becomes It is fixed to the lower housing 73.

In this case, the upper impeller 60 rotates in accordance with the rotation of the rotors 51 and 51a, and the air sucked into the suction port 71 flows into the main air flow X2 according to the solid line as shown in FIG.
And a cooling air flow Y2 for the stator coils 43, 44 following the dashed lines passing through the through holes 57, 57a of the rotor, and the upper and lower parts having a spiral tube shape as shown in FIG. It is transported along the inner walls of the housings 70, 73 and discharged to the discharge port 75.

Since the second embodiment employs a single impeller, the axial length L2 is further reduced to 40.5 mm, and the weight is reduced. Other features appear similarly because the operation is performed according to the same principle as in the first embodiment.

On the other hand, the first and second embodiments illustrate that the impeller connected to the rotor is integrated by a large number of connection protrusions of a separately manufactured rotor, as shown in FIG. The structure proposes a structure in which the impeller is integrally formed with the rotor from the beginning.

That is, after a large number of split piece magnets 52 are inserted into a ring-shaped Al magnet holder 530 having a large number of insertion holes 53a, a ring-shaped, eg, EGI-made magnet plate 55 is assembled on top of the magnet holder 530 to perform engineering. These side surfaces and the upper surface are covered by insert molding using plastic, for example, PPS, and 7 to 9 impeller blades 62a are integrally formed on the upper surface.

In this case, two coupling projections 62b are formed on the upper surface of the blade 62a for use in coupling with the Al upper plate 61 for impeller, respectively, and the upper plate 61 is coupled to each blade 62a. When the coupling projections 62b are inserted into the coupling holes 61a of the upper plate 61, the components can be easily integrated by, for example, an ultrasonic fusion method.

This structure corresponds to the rotor support 58 of the rotor 51.
Also serves as the lower plate of the impeller 60, and the blade 62a is formed integrally with the rotor support 58, greatly simplifying the assembly process.

FIG. 7 is a perspective view of the rotor impeller integrated structure assembled by the above method, which is inverted.
It is like.

As a result, the structure of the integral rotor impeller assembly 50 provides a structure suitable for high-speed rotation as a lightweight body while satisfying mechanical strength. Further, the conventional problem of the degree of adhesion between the upper plate and the lower plate can be completely eliminated, and the space fact can be optimized.

On the other hand, the vacuum generator can be applied not only to the conventional vacuum cleaner shown in FIG. 9 but also to an upright and canister system.

In the above-described embodiment, another air guide vane for guiding the air sucked by the impeller into the housing to the discharge port is not required as in the conventional case, and the air is discharged from the impeller. Since the air is guided to the outlets 72, 72a, 75 immediately without passing through the inside of the motor, a housing structure is formed in which the air guiding structure is simple and receives less air resistance.

Further, according to the present invention, by adding an air guide vane having a new structure different from the conventional air guide vane for guiding the sucked air from the upper portion of the housing to the lower outlet, the air flow can be further improved. A structure that can be effectively guided is proposed as follows.

Referring to FIG. 10, a number of air guide vanes 80 can be integrally installed on the stator support 41 of the first embodiment or the lower housing 73 of the second embodiment.

The vane 80 has a radially constant inclination so as to coincide with the flow direction of air discharged from the impellers 60 and 60a by centrifugal force, and gradually becomes closer to the outlets 72, 72a and 75. The length is increasing. Therefore,
The vane 80 guides the air flow by dividing the limited space more effectively than guiding the inhaled air to the outlets 72, 72a, 75 according to the operation of the impellers 60, 60a. You can reduce the resistance.

[0072]

As described above, the present invention uses an axial type coreless brushless DC motor and realizes an integral structure of the motor, the rotor and the impeller, thereby optimizing the space fact and making the impeller a double rotor. The number of rotations of the motor can be minimized while maintaining the same degree of vacuum by attaching to the upper and lower surfaces, respectively. As a result, it is possible to achieve ultra-miniaturization, thinning, low weight, low noise, long life, zero carbon dust, and improvement in productivity.

Further, the blade and lower plate of the impeller are integrally molded with the rotor as a roller support by insert molding using engineering plastic, thereby improving productivity and improving the degree of adhesion between the upper and lower plates and the blade. An integrated rotor impeller structure has been realized.

As described above, the present invention has been illustrated and described with reference to a specific preferred embodiment. However, the present invention is not limited to the above-described embodiment, but may be applied to any technical field to which the present invention belongs without departing from the spirit of the present invention. Various changes and modifications are possible by those having ordinary knowledge.

[Brief description of the drawings]

FIG. 1 is a partial cutaway view illustrating a vacuum generator for a double impeller vacuum cleaner according to a first embodiment of the present invention.

FIG. 2 is an exploded perspective view of the first embodiment with the upper and lower cases removed.

FIG. 3 When using a separately manufactured impeller,
It is sectional drawing which shows the coupling relationship between a rotor and an impeller.

FIG. 4 is a partial cutaway view illustrating a vacuum generator for a single impeller vacuum cleaner according to a second embodiment of the present invention;

FIG. 5 is a plan view of a second embodiment.

FIG. 6 is a cross-sectional view showing a connection relationship of a rotor impeller integrated structure using an engineering plastic according to the present invention.

FIG. 7 is a perspective view showing a rotor impeller integrated structure.

FIG. 8 is a plan view of a housing usable in the present invention.

FIG. 9 is a perspective view showing a conventional general vacuum cleaner.

FIG. 10 is a partial cutaway view of a vacuum generator for a vacuum cleaner employing a conventional AC universal motor.

[Explanation of symbols]

 1: Body housing 2: Wheel 3: Motor 4: Dust pack 5: Hose 6: Inlet 7: Filter 30: Motor 31: Rotary shaft 32, 33: Ball bearing 34, 35: Bushing 40: Stator 41: Stator support 41a: annular projection 43: stator coil 45: extension 46: boss 50: rotor impeller assembly 51, 51a: upper / lower rotor 52: magnet 53: magnet holder 53a: insertion hole 54: coupling projection 55: magnet plate 56, 57,57a: Through hole 58: Rotor support 60,60a: Upper / lower impeller 61: Upper plate 62,62a: Blade 62b: Coupling projection 63: Lower plate 64: Opening 65: Fixed groove 70,70a: Upper / Lower housing 71,71a: Air inlet 72,72a, 75: Outlet 73: Lower housing 74: Fixing bolt 80: Air guide vane

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-11-196558 (JP, A) JP-A-2-214439 (JP, A) JP-A-9-121521 (JP, A) JP-A-63-1988 107444 (JP, A) JP-A-9-327163 (JP, A) JP-A-4-287898 (JP, A) JP-A-4-81600 (JP, A) Japanese Utility Model Laid-Open No. 60-11668 (JP, U) 60-59 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) A47L 9/00 H02K 7/14 H02K 16/02 H02K 21/24

Claims (8)

(57) [Claims] 1. A stator which includes a plurality of stator coils integrated with a disk-shaped support and is located at a central portion; a rotating shaft rotatably supported by the stator; and a predetermined interval between upper and lower portions of the stator. A plurality of N-pole and S-pole split piece magnets are alternately arranged along the circumferential direction to form a disk shape, and upper and lower rotors rotate by interaction with the electromagnetic force of the stator coil; Upper and lower impellers respectively fixed to the rotor, and an outer peripheral portion respectively connected to the disk-shaped stator support, and air sucked through a suction port formed at the center of each with the stator support to exhaust air to one side. An upper and lower housing for guiding to an outlet, wherein the suction port is connected to a dust suction portion of a vacuum cleaner, and It is configured to be disposed in the empty vacuum cleaner housing vacuum generator, characterized by being used as a vacuum cleaner. 2. Each of the upper and lower rotors has a number of N-pole and S-pole split magnets, and a number of couplings used for coupling the impeller with the multiple insertion holes into which the multiple split magnets are inserted. A disk-type magnet holder having a projection; and a disk-type magnet plate having a magnetic circuit formed on the upper portion of the magnet holder and having a number of coupling through holes formed therein. The vacuum generator according to claim 1, wherein the vacuum generator is inserted and fixed in a fixing groove formed in a lower plate of the impeller through the plurality of through holes. 3. An upper rotor and an upper impeller, and a lower rotor and a lower impeller, respectively,
Pole and S pole split piece magnets, a disk type magnet holder having a large number of insertion holes into which the multiple split piece magnets are inserted, and a disk type magnet arranged on the upper part of the magnet holder to form a magnetic circuit A plate, a rotor support that covers the outer peripheral portion and the back surface of the magnet holder and the magnet plate, a number of blades integrally formed on an upper surface or a lower surface of the rotor support, each having a coupling protrusion, 2. An upper plate having a coupling hole formed with a coupling protrusion, wherein the rotor support and the plurality of blades are integrally molded by insert molding using engineering plastic.
6. The vacuum generator according to claim 1. 4. The support of the upper and lower housings and the stator has a diameter gradually increasing from a center side to an outer periphery at one point, and an outer periphery at one point at another point adjacent to the one point. 2. The vacuum generating apparatus according to claim 1, wherein the outer periphery of the first and second points has a shape extending in parallel, and the discharge port is formed in an extension of the first point and the other point extending in parallel. apparatus. 5. The stator support is formed integrally with an upper surface and a lower surface of the stator support so as to divide air discharged from the upper and lower impellers into a discharge passage and guide the air to a discharge port. The apparatus of claim 4, further comprising a plurality of air guide vanes extending a predetermined distance along the air guide vanes. 6. The vacuum generator according to claim 1, further comprising a plurality of through holes formed in upper and lower rotors for self-cooling the stator coil. 7. An axial brushless DC in which disk-type upper and lower rotors are symmetrically arranged at opposite ends of a rotating shaft rotatably supported on an inner peripheral portion of a disk-type stator with upper and lower portions of the stator facing each other. A motor, upper and lower impellers integrally fixed to the upper and lower rotors, respectively, and an outer peripheral portion coupled to an outer peripheral portion of the disk-shaped stator, and suction formed at the center of each with the stator. An upper and a lower housing for guiding the air sucked through the outlet to one of the outlets, wherein the inlet is connected to a dust suction part of the vacuum cleaner and disposed in the housing of the vacuum cleaner. And a double impeller type vacuum generator for use in vacuum cleaners. 8. An axial brushless DC in which upper and lower disk-type rotors are symmetrically disposed at both ends of a rotating shaft rotatably supported on an inner peripheral portion of the disk-type stator with upper and lower portions of the stator facing each other. A motor, an impeller integrally fixed to one of the upper and lower rotors, and a plurality of connections vertically extending from an outer peripheral portion of the disk-shaped stator toward a rotor side to which the impeller is not attached. And the other ends of the plurality of connecting portions are fixed to the lower surface, the outer peripheral portion is extended so as to cover the motor, and the diameter from the center side to the outer peripheral portion at one point is gradually increased. A lower housing in which an outer peripheral portion at one point and an outer peripheral portion at another point extend in parallel at another point adjacent to the point, and a shape corresponding to the lower housing; The outer peripheral portion is connected to the outer peripheral portion of the lower housing, and the outlet port is formed by extending the outer peripheral portion in parallel with the air sucked through the suction port formed in the central portion together with the lower housing according to the rotation of the impeller. And an upper housing for guiding the vacuum cleaner, wherein the suction port is connected to a dust suction part of the vacuum cleaner and disposed in the housing of the vacuum cleaner, and is used for a vacuum cleaner. Single impeller type vacuum generator.